Section 10 | Exceptions to liability under section 9.
From legislation.gov.uk
(1)Subject to subsection (2) below and to any express provision to the contrary made in relation to any conduct to which section 9 above applies, such conduct shall not give rise to any liability to a penalty under that section if the person whose conduct it is satisfies the Commissioners or, on appeal, an appeal tribunal that there is a reasonable excuse for the conduct.
(2)Where it appears to the Commissioners or, on appeal, an appeal tribunal that there is no reasonable excuse for a continuation of conduct for which there was at first a reasonable excuse, liability for a penalty under section 9 above shall be determined as if the conduct began at the time when there ceased to be a reasonable excuse for its continuation.
(3)For the purposes of this section—
(a)an insufficiency of funds available for paying any duty or penalty due shall not be a reasonable excuse; and
(b)where reliance is placed by any person on another to perform any task, then neither the fact of that reliance nor the fact that any conduct to which section 9 above applies was attributable to the conduct of that other person shall be a reasonable excuse.